Accessory table



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ACCES SORY TABLE Filed May 2l, 1928 18 Sheets-Sheet 18 OIOOC\IIIO 321619 7 l :Z7 32| --l 25 l v 10010 F26 Zyi Patented Sept. 4, 1934 UNITED sTATEs PATENT OFFICE ACCESSORY TABLE Robert c.. Angell, Prince my, N.. Y., mimitb Y The S. S.' White Dental Manufacturing Company, a corporation of Pennsylvania l Appucsanaiusy 21, 192s, semi-No. 219,546

75 Claims.

My invention relates particularly to thatclass of devices in which al plurality of conductor attached instruments for operative purposes are so closely assembled and associated as to be readily availablerto the operator,- and is especially directed to the means which-afford the convenient withdrawal and retraction of said instruments with respect-thereto.

The principal objects of my invention are to l0 provide an instrument supporting structure upon which a plurality of instruments for operative purposes may be assembled for convenient selection, and so ronnected by flexible conductors with a source of actuating power as to be normally directed in. position for convenient grasp of the operator and to permit freedom of movement into any required operative position Without shifting the instrument in the hand of the operator after being grapsed.

Other objects of my invention are to provide -an instrument supporting structure having rotatable means arranged to carry the instrument connecting conductors so spirally coiled thereon as to prevent short bending; kinking or twisting, ,and consequent damage or deterioration of said conductors by withdrawal or retractive movement of said instruments.

Further objects of my invention are to provide a compact instrument supporting structure em- 30 bndying all of the essential elements, and so constructed and arranged as to be readily taken apart and assembled, being formed of separate instrument supporting units superimposed one -upon another and compactly encased in u a readily removable housing.

My invention further includesan instrument supporting structure comprising a bracket table, from which the instruments and their conductors may be withdrawn in a direction substantially tangential to the periphery of a circle inscribed within thetable housing about the axis of the table, whereby the table may be disposed in working position forwardly of the patient and conveniently accessible to the operator, while the conductor carrying the instrument employed may be'linearly directed .from the table toward the mouth of the patient to be operated upon.-

My invention comprehends yielding means serving to separatethe coils ofthe instrument conductors and tending to expand said coils as it retracts the conductors and their instruments from withdrawn position.

My invention comprises means arranged to in effect arrest the conductor in any desired extent of withdrawal, so as to relieve the tension on said withdrawn conductor effected by the yielding retracting means, said conductor arresting means being Vso constructed thatits release may be conveniently eiected either by a further withdrawal movement of said conductor or by manually tripping said means.

My invention includes such an arrangement of the conductors connecting the electric transformer and air pressure regulators with the relatively movable instruments, that said transformer and regulators are embraced by the coils of said conductors, which contract and expand thereabout upon the respective withdrawaland retraction of said instruments.

My invention further Acomprehends such an arrangement of the table structure as to afford ample free surface space both under and above the table casing for attachment of adjunctive or auxiliary devices, andprovides such simple means of attachment that said devices may be readily removed as separate units for shipment or for replacement and may be easily reassembled.

Specically stated, the form of my invention as hereinafter described comprises an accessory equipment supporting device serving as a bracket table, rotatably supported upon a pedestal by an articulated hollow bracket; arm, and comprising a base rotatable about its axis on said bracket arm, and arranged to support a plurality of units each having a substantially central opening and carrying an annular tray rotatably mounted thereon in such concentric relation to said opening as to afford a hollow circular well or chamber in which power distributing and controlling mechanisms may be conveniently `disposed and connected through said hollow bracket arm with sources of power or energy supply, and with relatively movable instruments for operative purposes by iiexible conductors spirally coiled on said trays about said distributing and controlling mechanisms.

My invention also includes all of the various novel features of construction and arrangement as hereinafter more definitely specied.

In the accompanying drawings, Figure l is a perspective view of a dental equipment stand showing the various devices attached thereto and including'the accessory table; Fig. 2 is a central vertical longitudinal sectional view taken through the accessory head of said stand and through the bracket arms upon which the accessory table is mounted to swing into different relative positions; Fig. 3 is a plan view of the main-arm of the bracket which supports the table; Fig. 4 is a plan view of the forearm of said bracket; Fig. .5 is a plan view of the accessory table showing the superposed table-top tray removed and a portion of the closure broken away for convenience of illustration;

Figure 6 is a fragmentary side elevational view of said accessory table showing the signal pushbutton and the handle on the closure by which said closure may be manipulated; Fig. 7 is a fragmentary plan sectional view taken centrally through the forward right-hand portion of the accessory table and illustrating the closure moved into its open position; Fig. 8 is an inverted plan view of the accessory table with the lateral housing and closure removed for convenience of illustration, but showing the means for attaching the housing thereto; Fig. 9 is a fragmentary sectional perspective view of the pan in which the glass table-top tray is removably supported; Fig. 10 is a sectional elevational view showing the combination buffer stop and plug receptacle for the attachment of high voltage devices;

Figure 11 is a plan view of the table structure with the upper closure plate and lateral housing removed and disclosing the uppermost unit upon which a heated point instrument and its conductor is supported; Fig. 12 is a perspective view of the trip lever for effecting release of the rotary tray of said unit; Fig. 13 is a plan view of the table structure similar to Fig. 11 with the uppermost unit removed and disclosing the third unit from the bottom upon which the warm air syringe and its conductor is supported; Fig. 14 is a perspective view of the trip lever for effecting release of the rotary tray of said unit; Fig. 15 is a plan view of the table structure similar to Fig. 11 with the upper three units removed and disclosing the lowermost unit with the cut-off implement carried thereby drawn outl to the limit of its extended movement;

Figure 16 is a fragmentary vertical sectional view taken on the line 16-16 in Fig. 15 through the locking device which retains the tray in locked position when said instrument is withdrawn; Fig. 17 is a'perspective View of the wedge-block; Fig. 18 is a perspective view of the roller which cooperates with said wedge-block to retain the tray in its rotated position; Fig. 19 is a central vertical longitudinal sectional view of the accessory table extending in a plane from front to back` thereof and showing in elevation the forward end of the bracket upon which it is rotatably supported; Fig. 20 is a vertical transverse sectional view taken through one side of the accessory table on the line 20-20 in Fig. 5 and showing the rollers upon which the trays of the respective units are mounted, the closure being shifted in this view into the plane of section for convenience of illustration; v

Figure 21 is a transverse vertical sectional view taken through one side of the accessory table on the line 21-21 in Fig. 5 and including the attacning yoke by which the lateral housing is secured to the upper and lower casing plates of said table, the closure being shifted in this view into the plane of section for convenience of illustration;

`Fig. 22 is a transverse vertical sectional view' taken through one side of the accessory table on the line 22-22 in Fig. 13 in a plane passing through the guiding sheaves and showing the housing structure including the closure; Fig. 23 is an enlarged fragmentary central vertical sectional view of the accessory table in the same plane as the sectional view shown in Fig. 19, but showing the trays relatively rotated to bring into the plane of section certain of the parts carried thereby for convenience of illustration; Fig. 24

is a perspective view of the cover plate with which each of the trays of the respective units is provided to retain the conductor and spring coiled therein; Fig. 25 is a perspective view of the spring clip which is arranged to be attached to the inner peripheral flange of each of the supporting plates of the respective units and'with which the inner end of the spring for rotating the trays thereof is engaged; f

Figure 26 is a perspective view of the spring clip which is arranged to be attached to each of the outer peripheral margins of the trays of the respective units and to which the outer end of the spring is arranged to be engaged; Fig. 27 is a perspective view of the spring the ends of which are arranged to be engaged with the clips shown in Figs. 25 and 26; Fig. 28 is a vertical longitudinal sectional view of the spring clip shown in Fig. 25 and showing the method of canting the spring to engage its notch therewith; Fig. 29 is a fragmentary central vertical transverse sectional view of the accessory table showing the transformer frame, the control switches and valves in front elevation for convenience of illustration; Fig. 30 is a plan view of the controller valve supporting bar;

Figure 3l is a staggered sectional view of said bar showing the passagesways extending therethrough on theline 31-31 in Fig. 30; Fig. 32 is a vertical longitudinal sectional view taken on the line 32-32 in Fig. 29 in a plane extending axially through the volt controlling switch and controlling valve, the section of the valve being also taken on the line 32--32 in Fig. 33; Fig. 33 is a rear elevational view of the controlling valve shown in Fig. 32, the cap forming the valve chamber being removed for convenience of illustration; Fig. 34 is a central longitudinal sectional View of said controlling valve taken in relatively angular planes from the axis on the line 34--34 in Fig. 33; Fig. 35 is a perspective view of the pusher-plate which is carried by the valve stem and arranged to actuate the valve plate;

Figure 36 is a perspective view of the valve plate; Fig. 37 is a perspective view of the transformer unit including the control switch and the volt regulating switch; Fig. 38 is a perspective view of the air controller valve unit including the valve supporting bar and the' two air controlling valves mounted thereon; Fig. 39 is a vertical longitudinal sectional view of the fitting and the parts attached thereto to which is connected the flexible tubing, which terminates at its 4outer end in the warm air syringe; Fig. 40 is a transverse vertical sectional view of said fitting taken on the line 40-40 in Fig. 39 and showing the air pipe connection leading from the pressure regulator valve;

Figure 41 is a central longitudinal sectional view of the splicer and the parts attached thereto which connects the ilexible tubing from the air pressure regulating valve with the flexible tubing extending to the warm air syringe; Fig. 42 is a perspective view of the clip which is arranged to engage said splicer with the tray; Fig. 43 is a perspective view of the terminal clip to which theelectric wires are attached which connect the transformer with the fitting shown in Fig. 39; Fig. 44 is a. perspective view of one of the nipples included in the splicer shown in Fig.,4l, the difference between this splicer nipple and the companion splicer nipple being the relatively connected internal'and external threads at their connected ends; Fig. 45 is a transverse vertical 

